Magnetic Stirrer Hot Plate Mixer 1000ml Stirring Capacity 5 x 5 inch Max 520°F Hotplate and 100-2000 RPM Stirrer, Stirring Bar & Support Stand Included

Addition for my photographic darkroom, stirring and heats, works like it says... and it does get crazy hot so be careful.

I use two of these for electroplating. The plates head up the chemicals to 130F in a decent amount of time when set to 100% power. As you turn the power down, I believe it just 'pulses' power less and less. That said, it does indeed turn the temp down. With a little trial/error I can eventually find a setting that'll keep my beakers at 130F solid. The speed controll for the stirrer is pretty wide range. I'm able to make it turn slow enough to avoid a vortex in small beaker...or turn it up to stupid speeds and get a vortex spattering mess. Very happy overall, which is why I have two!

My main issue with this unit is the method used to set temperature. I am familiar with the usual designs used for adjusting intensity of heaters, lamps and other resistive loads having designed them myself. This has the same issue that many low-cost dimmers have in that you cannot set the temperature (or intensity) to a value below a certain point. Starting at OFF, turning up the control results in nothing until a certain point is reached, then suddenly it begins to work and the heating/intensity can be finely adjusted after that point. Starting at full-ON, turning the intensity/heating down drops as expected until a point is reached, then it turns OFF abruptly. But the unit is low-cost and if you are not in the situation of having to set a specific low heat level, then it may not be an issue. I would have been happier if the threshold point were lower since I did need to have some warm heating. My second issue is that a finer thread or different alloy for the thermometer holder clamp would be nice. After crunching down on the clamp screw, the arm holding the thermometer was still not rigid enough to hold the thermometer in one place. Finally, a protection ring around the heating plate would help prevent accidental burning if a person happened to move their hand laterally across the table and touch the rim of the hot plate. But these are all 4-star features and with an evaluation system where the vendor is guaranteed one star, making this a three-star rating is reasonable to me. If I planned to use this often enough, I would pay more and get these features. Since this was for showing an on-line schooled child some cool chemistry experiments, I am happy with this unit. It does the job I wanted, has worked the 7-8 times I need it, seems to be well designed beyond the above comments and the price was right.

Love it. Goes zero to surface of the sun in no time. Has some what of temperature control. Does what its supposed to do. I would buy another. The mixing is paramount!

This product lasted in our chemistry lab after daily use by multiple people for just over 3 years. After about 40 months one was no longer heating up and the other is showing signs of end of life, so we're ordering replacements. Great value. Not great control/accuracy over the heat, but you get what you pay for.

So this was new out of the box and I set it up and plugged it in. I turned the heat knob to on and adjusted it to the lowest setting and tested it with my thermometer gun. 135 F but fluctuations between 123 F and 135 F when knob is stationary. Then I went midway between the max and minimum which is almost all the way to the right and got 225 F -235 F. I detected a smell coming off the plates at this temperature. It is definitely off gassing a chemical. I cranked up to max to see how hot it tops off at. When it reached 300 F I smelled the chemical odor very strongly and then I started to see white smoke. Fearing something may be overheating I decided to kill the test. I turned the knob off and heard the click and the red led light turned off. I then went away for 30 minutes for it to cool and then reexamine the machine. When I came back and placed my hand across the top to pick it up I heard a loud sizzling sound. My thumb was seared like a steak to the plate. I grabbed my thermo gun and read 483 F. First degree burn on my thumb. I recheck the knob to make sure it is off and turn it back on and back off again. I recheck the temperature and still 483 F. I then flip the kill switch on the side to the circle which should mean open circuit. Nope it is still on 483 F. The only way to turn it off is to unplug it. The unit I received is faulty from the manufacturer straight out of the box and extremely dangerous. Thank God I came back to check on it or everything in my house would have been burned down to the ground because this surely would have caught fire within the hour.

Nice build quality Heats it's extremely fast and very intense stirring can be all utilized through the mixer plate and heater

I practice hermetic lab alchemy and produce educational material for it on tiktok. Usually I burn out a hot plate about every 8 months, but this little beast has been chugging along with almost daily use for well over a year now. Reliable, durable, does exactly what it says it does, and has a pleasantly small footprint in my limited, cramped lab space. It heats quickly and cools just the same. When I finally manage to destroy it I'll definitely be replacing it with this same model.

Si bien es un equipo pequeño, cumple con las funciones y especificaciones, si eres entusiasta o tienes un pequeño laboratorio este es un equipo para ti, a un precio bastante bueno tienes una parrilla con agitación funcional, salvo que necesites temperaturas más altas, porque tiene limitaciones, viene con un brazo de sujeción bastante útil, solo tiene el detalle de no tener una pantalla para visualizar las revoluciones y temperatura así que debes hacerlo con un termómetro y a "mano" el tiempo es relativamente corto tarda unos 8 minutos en calentar 100 mL de agua a 100 grados C

Works perfectly, thank you for the great product. It mixes really well and heats up super fast.

Excelente producto tipo laboratorio Recomendado para principiantes intermedios y pros

Heat worked great but the stir dial doesn't actually turn on stir.

Es funcional, es compacto, lo único que no verifique es si funcionaba la plancha de calor